Index: search404.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/search404/search404.module,v
retrieving revision 1.16.2.2
diff -u -p -r1.16.2.2 search404.module
--- search404.module	23 Mar 2010 08:09:29 -0000	1.16.2.2
+++ search404.module	7 Nov 2010 22:41:42 -0000
@@ -58,7 +58,7 @@ function search404_get_keys() {
     $keys = preg_replace("/\.($extensions)$/", '', $keys);
   }
 
-  $keys = preg_split('/[' . PREG_CLASS_SEARCH_EXCLUDE . ']+/u', $keys);
+  $keys = preg_split('/[' . PREG_CLASS_UNICODE_WORD_BOUNDARY . ']+/u', $keys);
 
   // Ignore certain words
   $keys = array_diff($keys, explode(' ', variable_get('search404_ignore', 'and or the')));